Cullman Auto Repair

The head gasket is basically the seal between the engine block and the cylinder head. It has a tough job because it has to keep combustion pressure sealed in while also keeping oil and coolant in their proper passages. When it fails, the symptoms can range from mild to dramatic. Most head gasket failures are not random. They usually trace back to heat, pressure, or a mechanical condition that slowly weakened the seal until it gave up. Head Gasket Failure Causes A head gasket can fail for several reasons, but overheating is at the top of the list. Extreme heat can warp the cylinder head slightly, and even a small warp can weaken the sealing surface. Once the seal is compromised, gases and fluids can start crossing paths. The second common theme is pressure. Combustion pressure is intense, and if detonation or abnormal combustion is happening, it can stress the gasket harder than it was designed to handle. Over time, that can contribute to a weak spot that turns into ... read more

A check engine light can come on when the car feels totally normal, which is exactly why people put it off. You run errands, it drives fine, and you tell yourself you’ll deal with it later. The problem is that the light is not a suggestion that something might happen someday. It’s the computer raising its hand because it saw data that didn’t make sense for long enough to save a fault. What The Check Engine Light Is Actually Telling You Your engine computer is always watching sensors and comparing what it sees to what it expects. When a reading is outside the normal range, or a system isn’t responding correctly, it stores a code and turns the light on. That code is a clue about the system and the condition, not a guaranteed bad part. It’s also worth separating a steady light from a flashing light. A steady light can cover a wide range of issues, some minor and some not. A flashing light often points to an active misfire, and that can hea ... read more